add integration test with mock server

tests/integration.test.js

@@ -0,0 +1,33 @@
+import { mockServer } from "../mock_server.js";
+import { discoverDevices } from "../discovery.js";
+import { buildLogger } from "../logger.js";
+import { Commands } from "../datatypes.js";
+
+import assert from "assert";
+
+const hstrToU8 = (hs) => new Uint8Array(hs.match(/../g).map((h) => parseInt(h, 16)));
+describe("integration", () => {
+  it("emits login event upon logging in", () => {
+    // TODO
+  });
+
+  it("discovers a device", () => {
+    buildLogger("trace");
+    const EXPECTED_SERIAL = "BATD156362WONJM";
+    const punchPkt = "f14100144241544400000000000262ca574f4e4a4d000000";
+    const mockSock = mockServer((msg) => {
+      const cmd = msg.readU16();
+      if (cmd == Commands.LanSearch) {
+        const buf = hstrToU8(punchPkt);
+        return [buf];
+      }
+      return [];
+    });
+    const ev = discoverDevices("127.0.0.1");
+    ev.on("discover", (rinfo, dev) => {
+      assert.deepEqual(dev.devId, EXPECTED_SERIAL);
+      ev.emit("close");
+      mockSock.close();
+    });
+  });
+});